GPON ONU Home Gateway Reference Design
An illustrative GPON ONU reference design for FTTH home gateways: 1 PON optical port, 4 Gigabit Ethernet ports, 1 POTS phone port, USB 2.0 and M.2 WiFi, with a single 12V supply input. Each position is marked with the VOOHU parts available, recommended part numbers and competitor cross-references.
Illustrative PCB ⇄ Schematic
Illustrative top-side view arranged by functional zone (not the actual layout). Red numbered dots mark positions VOOHU can supply. Click a component on the board, an entry in the index below or a part in the schematic to see recommended parts, competitor cross-references and package pinouts on the right.
The 12V adapter input passes a 3A fuse, the SMBJ18A input TVS and the VOOHU power-line common-mode choke L6 (WHACM07A40R701), which filters common-mode noise to form the +12V bus. Three TPS54302 synchronous bucks then generate +5V / +3V3 / +3V3_WIFI, each with a VOOHU molded output inductor. The integrated regulators of the switch IC and the PHY each use a 2.2µH molded inductor to produce the 1.1V / 1.0V core supplies.
Board bill of materials
Summarized by position; click any row to locate it on the board above.
| No. | Zone | Position | Ref. | VOOHU category | Recommended part | Availability |
|---|---|---|---|---|---|---|
| 01 | A PON optical port | SFP cage + 20pin host connector | J1 | SFP Cage / SFP Connectors | WHSFP00211W018 | VOOHU |
| 02 | A PON optical port | SFP supply filter inductor | L10 L11 | Molded Inductors | WHYTA0420 Series 4.7µH | VOOHU |
| 03 | B Ethernet ports | RJ45 with integrated magnetics (LAN1/2) | J2 | RJ45 with Integrated Magnetics | SYT112Q066AB2A1D | VOOHU |
| 04 | B Ethernet ports | Plain RJ45 (LAN3/4) | J3 | RJ45 Connectors | SYT561288AB2A3DY1027 | VOOHU |
| 05 | B Ethernet ports | Gigabit LAN transformer (LAN3) | T1 | Gigabit LAN Transformers | WHSG24002G | VOOHU |
| 06 | B Ethernet ports | Chip LAN transformers ×4 (LAN4) | T2 T3 T4 T5 | 4532B Series | WHLT-4532B-201MGF | VOOHU |
| 07 | B Ethernet ports | Chip LAN companion common-mode chokes ×4 | L1 L2 L3 L4 | 2012A Series | WHLC-2012A-900T0 | VOOHU |
| 08 | B Ethernet ports | Ethernet ESD arrays ×6 | D1 D2 D3 D4 D5 D6 | TVS / ESD | WHALD03G4U | VOOHU |
| 09 | C Switch / PHY | 5-port Gigabit switch IC | U2 | Ethernet Switch ICs | JL6107S | VOOHU |
| 10 | C Switch / PHY | Gigabit PHY | U3 | Ethernet PHY | JL2101C-NC | VOOHU |
| 11 | C Switch / PHY | On-chip regulator inductor | L9 L13 | Molded Inductors | WHYTA0420 Series 2.2µH | VOOHU |
| 12 | C Switch / PHY | 25MHz crystal | Y1 Y2 | — | — | Non-VOOHU |
| 13 | D Voice · USB · WiFi | RJ11 phone port | J4 | RJ11 Connectors | SYT53211166IWA1DY1017 | VOOHU |
| 14 | D Voice · USB · WiFi | Gas discharge tubes (primary surge protection) | GDT1 GDT2 | GDT | WHGD200V1P0B | VOOHU |
| 15 | D Voice · USB · WiFi | Bidirectional TVS (secondary clamp) | D8 | TVS / ESD | WHTB058VA | VOOHU |
| 16 | D Voice · USB · WiFi | FXS/SLIC daughter card socket | J8 | — | 2×8 2.54mm female header | Non-VOOHU |
| 17 | D Voice · USB · WiFi | USB 2.0 A receptacle | J5 | USB / Type-C | WH127272040004H4G | VOOHU |
| 18 | D Voice · USB · WiFi | USB ESD array | D7 | TVS / ESD | WHTA5V01P2C | VOOHU |
| 19 | D Voice · USB · WiFi | USB signal line common-mode choke | L5 | Signal Line CMC | WHAC-2012A-900T0 | VOOHU |
| 20 | D Voice · USB · WiFi | M.2 WiFi socket | J9 | — | 2199230-4 | Non-VOOHU |
| 21 | E Power | DC 12V power jack | J6 | — | PJ-063AH | Non-VOOHU |
| 22 | E Power | Input TVS | D10 | — | SMBJ18A | Non-VOOHU |
| 23 | E Power | Power line common-mode choke (EMI) | L6 | Power Line CMC | WHACM07A40R701 | VOOHU |
| 24 | E Power | Synchronous buck ×3 | U10 U11 U12 | — | TPS54302DDCR | Non-VOOHU |
| 25 | E Power | Molded inductors ×3 (DC-DC) | L7 L8 L12 | Molded Inductors | WHYT0630 Series 4.7µH | VOOHU |
| 26 | F Core board | GPON core board sockets A/B | J10 J11 | — | 2×40 2.54mm female header | Non-VOOHU |
Resources & downloads
Board bill of materials
Reference designators, zones, VOOHU categories, recommended parts and availability for all 26 positions. Opens directly in Excel.
Datasheet collection
Datasheet PDFs for the VOOHU parts recommended on this board.
Design files & footprint library
Schematic, PCB, and VOOHU part footprints and 3D models.
Coming soonRequest the ONU reference design full package
Includes the full-board BOM, datasheets for the recommended VOOHU parts and position-by-position selection notes. For selection advice tailored to your port configuration, please say so in your requirements.
